Chromium-free insulation coating material for non-oriented silicon steel
Abstract
The present invention refers to a chromium-free insulation coating material for non-oriented silicon steel, comprising, in parts by weight, the following components: metal dihydrogen phosphate salt of 100 parts, epoxy resin of 10˜60 parts, naphthenate drier or isooctanoate metal salt drier of 0.001˜10 parts, organic solvent of 0.001˜100 parts and pure water of 60˜2000 parts. The metal dihydrogen phosphate salt is Al(H 2 PO 4 ) 3 , Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 ; the epoxy resin is water-soluble epoxy resin or epoxy resin emulsion. Chromium-free insulation coating material of the present invention, after being coated on non-oriented silicon steel, renders highly transparent appearance, and has excellent insulativity, corrosion resistance, adhesiveness, weldability and manufacturability, so as to eliminate defects of the existing chromium-free coating, such as sticky and un-wear-resistant and to meet environment protection requirements.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A chromium-free coating composition comprising, in parts by weight:
metal dihydrogen phosphate salt
100
parts;
epoxy resin
10~60
parts;
isooctanoate metal salt drier
0.001~10
parts;
organic solvent
0.001~100
parts;
pure water
60~2000
parts;
characterized in that the isooctanoate metal salt drier is potassium, manganese, sodium, nickel, copper, cerium, zinc, zirconium or calcium isooctanoate salt.
2. The chromium-free coating composition as defined in claim 1 , characterized in that said metal dihydrogen phosphate salt is Al(H 2 PO 4 ) 3 , Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 2 or Zn(H 2 PO 4 ) 2 .
3. The chromium-free coating composition as defined in claim 2 , characterized in that in the Al(H 2 PO 4 ) 3 , molar ratio of Al 2 O 3 to H 3 PO 4 is 0.14˜0.20:1.
4. The chromium-free coating composition as defined in claim 2 , characterized in that in the Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 , molar ratio of MgO, CaO, or ZnO to H 3 PO 4 is 0.40˜0.60:1.
5. The chromium-free coating composition as defined in claim 1 , characterized in that the epoxy resin is water-soluble epoxy resin or epoxy resin emulsion.
6. The chromium-free coating composition as defined in claim 1 , characterized in that the organic solvent is glycol or glycerol.
7. A chromium-free coating composition comprising, in parts by weight:
metal dihydrogen phosphate salt
100
parts;
epoxy resin
10~60
parts;
naphthenate drier or isooctanoate
5~8
parts;
metal salt drier
organic solvent
0.001~100
parts;
pure water
60~2000
parts.
8. The chromium-free coating composition as defined in claim 7 , characterized in that said metal dihydrogen phosphate salt is Al(H 2 PO 4 ) 3 , Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 .
9. The chromium-free coating composition as defined in claim 8 , characterized in that in the Al(H 2 PO 4 ) 3 , molar ratio of Al 2 O 3 to H 3 PO 4 is 0.14˜0.20:1.
10. The chromium-free coating composition as defined in claim 8 , characterized in that in the Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 , molar ratio of MgO, CaO, or ZnO to H 3 PO 4 is 0.40˜0.60:1.
11. The chromium-free coating composition as defined in claim 7 , characterized in that the epoxy resin is water-soluble epoxy resin or epoxy resin emulsion.
12. The chromium-free coating composition as defined in claim 7 , the coating material comprising naphthenate drier, characterized in that the naphthenate drier is cobalt, manganese, iron, copper, cerium, zinc, calcium, potassium, barium or nickel naphthenate.
13. The chromium-free coating composition as defined in claim 7 , the coating material comprising isooctanoate metal salt drier, characterized in that the isooctanoate metal salt drier is potassium, manganese, sodium, nickel, copper, cerium, zinc, zirconium or calcium isooctanoate salt.
14. The chromium-free coating composition as defined in claim 7 , characterized in that the organic solvent is glycol or glycerol.Cited by (0)
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